68
wallaceperimetersecurity.com
Phone: 866.300.1110
POWER
Power
Installing the Earth Ground
An earth ground refers to the grounding rod and accompanying equipment ground which need to be
installed to safeguard against potential electrical shock and damage to personnel and equipment.
The potential for lightning discharge exists
with all gates, fences and gate operators.
National Electric Code (NEC) requires a
separate earth ground in addition to the
required equipment ground.
Wallace Perimeter Security recommends grounding the operator with a separate earth ground rod to
shield the operator against electromagnetism and other electrical signals that may cause erratic operation
with or damage to the SmartDC Controller.
If you do not ground the operator with
a separate earth ground rod, you risk
voiding the Limited Warranty.
For earth grounding requirements, refer to the National Fire Protection Association (NFPA) 780 -
Standard
for the Installation of Lightning Protection Systems
. Highlights of the standard include:
•
The ground rod is solid copper rod: minimum requirements 5/8” (16mm) diameter and 10 ft. (3m)
in length.
•
The ground rod is driven into the earth (refer to local codes for depth requirements).
•
The ground rod is electrically bonded to the chassis with a single length of un-spliced 6AWG copper
wire less than 3 ft. (91cm) in length.
•
Local jurisdictions may impose additional requirements above the NEC and NFPA 780. Consult the
local codes and regulations regarding requirements in your area.
Take the following steps to comply with NEC and NFPA 780 standards:
1�
Install a grounding rod per local building codes. See Figure 15.
2�
Attach a large earth ground wire (6AWG) from the grounding rod to the lug nut on the base of the
chassis.
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